What Is California Labor Code §4620: Contested Claim and Medical-Legal Expense?

For purposes of this article, a medical-legal expense means any costs and expenses incurred by or on behalf of any party, the administrative director, or the board, which expenses may include X-rays, laboratory fees, other diagnostic tests, medical reports, medical records, medical testimony, and, as needed, interpreter's fees by a certified interpreter pursuant to Article 8 (commencing with Section 11435.05) of Chapter 4.5 of Part 1 of Division 3 of Title 2 of, or Section 68566 of, the Government Code, for the purpose of proving or disproving a contested claim.

What Does California Labor Code 4620 Define?

Labor Code 4620 defines two things: when a claim is contested, and which costs count as medical-legal expenses.

Most of a workers' compensation claim runs through ordinary medical care. You see a doctor. You get tests or therapy. The employer pays for that under a separate rule. A medical-legal cost is different. It is the cost of outside proof, gathered only after a claim turns into a dispute. Labor Code 4620 sets the definitions. Labor Code 4621 and Labor Code 4622 build their own payment rules on top of them.

The definitions apply to either side of a dispute. An employer, an insurer, an injured worker, or a deceased worker's dependents can each face a medical-legal cost. That happens once a claim meets the test below.

When Does a Claim Become Contested Under Labor Code 4620?

A claim is contested once your employer knows you want a benefit, then rejects it, delays too long, or ignores a payment demand.

Subdivision (b) sets this test. The employer must first know, or reasonably should know, that you want a benefit tied to your work injury. From there, the claim becomes contested the moment any one of these is also true:

• It denies owing the benefit.
• It still has not accepted the benefit once a reasonable period for deciding whether to dispute it has run out.
• It leaves a payment demand unanswered once the deadline set for that payment has passed.

Meeting even one of these conditions is enough. A denial, a stalled non-decision, and silence past a payment deadline each make the claim contested the same way.

What Counts as a Medical-Legal Expense, and What Does Not?

The law counts specific proof-gathering costs as medical-legal expenses, but excludes a report that is only incidental to your ongoing care.

Subdivision (a) lists what can qualify: X-rays, laboratory fees, other diagnostic tests, medical reports, medical records, medical testimony, and a certified interpreter's fees. Each cost must help prove or disprove the dispute. It cannot simply treat the injury.

Subdivision (c) narrows that list. A cost does not qualify just because a doctor ordered a test or wrote a report. It counts only when the report can prove or disprove a specific disputed medical fact your claim depends on. A judge weighs the substance of the report, not only its form. In practice, this usually means a report from a qualified medical evaluator (QME) or agreed medical evaluator (AME), not your treating doctor.

Labor Code 4620 sets no payment deadline on its own. Labor Code 4621 pauses most full evaluations for the first 60 days after you file a claim form. Labor Code 4622 then gives your employer 60 days to pay a medical-legal bill, with a 10 percent increase and interest added for a late payment. See our guide to Labor Code 4621 for the full timeline.

Does Labor Code 4620 Cover an Interpreter at a Medical Exam?

Yes. Subdivision (d) gives you a qualified interpreter for the exam itself when you cannot proficiently speak or understand English.

If you cannot effectively communicate with the examining physician, you can ask for a qualified interpreter at that exam. Your employer or its insurance carrier then pays for the interpreter. The cost follows the same fee schedule named in Labor Code 5811.

One limit applies. A provisionally certified interpreter is different. Your employer must pay for one only if it agreed to that person in advance, or if you need a language outside the government's certified list. This rule covers the exam itself. For the wider right to an interpreter at hearings and depositions before the Workers' Compensation Appeals Board (WCAB), see our guide to Labor Code 5811.

How Does Labor Code 4620 Connect to Other California Workers' Comp Rules?

Labor Code 4620 supplies the definitions that Labor Code 4621, 4622, 4064, and 4060 each build on.

Labor Code 4621 places the duty to reimburse these costs on your employer. It also sets the 60-day evaluation pause after you file a claim form. Labor Code 4064 is a separate rule. It makes your employer pay for a panel evaluation under sections 4060, 4061, or 4062.

Labor Code 4060 is narrower than the contested-claim test here. It applies only to a dispute over whether a claimed injury is covered at all. It stops applying once your employer accepts a body part as compensable. A Labor Code 4620 contested claim is broader. It can also cover a payment demand your employer ignores past its deadline, even for a benefit it has not formally rejected. Ordinary treatment is different again. Labor Code 4600 pays for your actual medical care, apart from the proof-gathering costs defined here.

What Should You Save If Your Claim Becomes Contested?

Save every notice, bill, and report tied to the dispute, and write down the date your employer first knew you wanted a benefit.

Keep a copy of your claim form. Keep any letter where your employer rejects, delays on, or stays silent about a benefit you asked for. Keep the itemized bill for any evaluation, test, or interpreter, plus proof of the date your employer or its carrier received it. Those dates decide whether a claim was contested and whether a bill was paid on time.

Put an interpreter request in writing if you do not get one. Ask your employer's claims administrator, in writing, if a bill sits unpaid with no explanation. For how a claim moves forward from here, see the California workers' compensation claim process. A licensed attorney can review the dates and paperwork if a dispute does not resolve on its own.

Disputes about whether a claim is contested, or whether a medical-legal bill or interpreter request was handled correctly, usually turn on dates and paperwork rather than one conversation. Yazdchi Law P.C. looks at those specifics before advising on a California workers' compensation claim. The firm reviews each matter on its own facts. Call (661) 273-1780 or use the contact form for a free initial consultation.